Polargraphic Determination of Antioxidants in Gasoline

Electro-Oxidation of Phenylenediamines and Related Compounds at Platinum Electrodes. Effects of Acid Strength.

“…The rate constants of this dissociation reaction for p-phenylenediamine and N,N-dimethylp-phenylenediamine have been estimated from this data. THE ELECTROCHEMICAL Oxidations of the isomers of phenylenediamine and many related compounds have been extensively investigated (5)(6)(7)(8)(11)(12)(13)(14).…”

“…Interest in these compounds arises from their widespread applications as aromatic intermediates (8) and antioxidants (7,13). Adams and coworkers (5, 6, 8,12) have determined the final products of electro-oxidation for a number of these compounds and have established in part the reaction mechanisms with the aid of electron paramagnetic resonance (EPR) techniques.…”

Anodic Voltammetry to +2.0 Volts. Application to Hydrocarbons and Oxidation Stability Studies

“…Gaylor et al (8,9) and Elving and Krivis (6) used a wax-impregnated carbon electrode for studying oxidation inhibitors in buffered solutions. Similar electrodes were used for determining antioxidants in gasoline (7). The rotating (RPE) and the stationary platinum microelectrode (SPE) have been used with good results for the anodic oxidation of phenols {1, 12, 21), aromatic amines (7,13,20, 21, 23), and sulfides (5).…”

Carbon electrodes fabricated by low-temperature pyrolysis of ethylene on nickel

“…However, the carbon deposited in the larger ends of the regular (unpulled) glass capillaries did not form a closely packed mass and was porous (vide infra). Consequently, a sealing epoxy (Epo-Tek 301, Epoxy Technology, Inc.) was used to impregnate the carbon and eliminate porosity (42). Electrical contact was accomplished by filling the other end of the capillary with Epo-TK H20-E electrically conducting silver epoxy (Epoxy Technology, Inc.).…”